Article
Chemistry, Physical
Weiyu Wang, Qiang Wang, Jun Xu, Feng Deng
Summary: Parahydrogen-induced polarization (PHIP) is a technique that can increase the NMR sensitivity by several orders. It is a powerful tool to characterize catalyst properties and elucidate reaction mechanisms. In this Perspective, the heterogeneous PHIP (HET-PHIP) technique and its application in catalytic hydrogenation are comprehensively reviewed. The fundamentals of HET-PHIP are introduced and its ability to provide information about catalyst morphology and electronic properties is discussed. The mechanistic understanding of catalytic hydrogenations using HET-PHIP is also discussed.
Article
Chemistry, Physical
Weiyu Wang, Qiang Wang, Jun Xu, Feng Deng
Summary: Parahydrogen-induced polarization (PHIP) is an NMR hyperpolarization technique that enhances NMR sensitivity. This technique generates hyperpolarization through pairwise addition behavior, making it useful for catalyst characterization and understanding reaction mechanisms. This Perspective provides a comprehensive overview of the heterogeneous PHIP (HET-PHIP) technique and its applications in catalytic hydrogenation. The fundamentals of HET-PHIP are introduced, along with its ability to provide information about catalyst morphology and electronic properties. The paper also discusses advancements in mechanistic understanding achieved using HET-PHIP and the limitations and prospects of this technique.
Article
Chemistry, Multidisciplinary
Wenyan Li, Xinying Lin, Jing Long, Bo Zheng, Zhaorui Pan, Leiming Lang, Guangxiang Liu
Summary: The mesoporous core-shell structure Ag@SiO2 nanospheres are constructed to prevent aggregation of Ag nanoparticles during hydrogenation, leading to superior catalytic performance in terms of 100% conversion and selectivity in the hydrogenation of nitro compounds, with good recycling performance for multiple uses.
Article
Chemistry, Physical
Alexandra Jakab-Nacsa, Emoke Sikora, Adam Prekob, Laszlo Vanyorek, Milan Szori, Renata Zsanett Boros, Karoly Nehez, Martin Szabo, Laszlo Farkas, Bela Viskolcz
Summary: The aim of this study is to establish a mathematical model for the characterization and comparison of catalysts to support catalyst development. Through the MIRA21 model, 154 catalysts were ranked and classified, and 8% of them received the highest ranking. This ranking model can guide the selection of the most effective catalyst system for aniline production.
Review
Chemistry, Multidisciplinary
Zhidong An, Jiang Li
Summary: Catalytic transfer hydrogenation (CTH) is now recognized as a promising method for hydrogenation based on biomass, with recent studies focusing on furfural (FF) CTH over solid catalysts. The review highlights the importance of developing more effective catalysts and industrial applications for furfuryl alcohol (FFA) production via CTH, as well as the potential for advancements in other reactions utilizing CTH technology.
Article
Chemistry, Physical
Zi-Jie Gong, Yemineni S. L. Narayana, Yen-Chun Lin, Wei-Hsiang Huang, Wei-Nien Su, Yi-Pei Li, Masayoshi Higuchi, Wen-Yueh Yu
Summary: In this study, ruthenium-based metallo-supramolecular polymers (Ru-MSPs) were synthesized and used for heterogeneously catalytic transfer hydrogenation of carbonyl compounds. The polymerization process was controlled by adjusting the ligand/metal ratio and synthesis conditions. The coordinatively unsaturated ruthenium atoms were identified as the active sites for carbonyl reduction, and the Ru-MSPs exhibited enhanced activity and reusability compared to monomeric counterparts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Green & Sustainable Science & Technology
Sudeep Mudhulu, Zi-Jie Gong, Hao-Chuan Ku, Yi-Hsuan Lu, Wen-Yueh Yu
Summary: This study systematically reviews recent advances in the heterogeneous catalytic formic acid-mediated hydrodeoxygenation processes of furfural and 5-hydroxymethylfurfural, including hydrogenation and hydrogenolysis reactions. The mechanisms of individual and combined activations of formic acid and substrates on the catalyst surface are also discussed, providing fundamental insights for future catalyst design.
MATERIALS TODAY SUSTAINABILITY
(2022)
Article
Biochemical Research Methods
Yuyang Wu, Jue Wang, Hua Cui
Summary: In this study, N-(4-aminobutyl)-N-ethylisoluminol (ABEI)-functionalized CuFe2O4 magnetic nanomaterial (ABEI/CuFe2O4) with high catalytic activity was synthesized, demonstrating excellent chemiluminescence properties and superior catalytic ability compared to other metal oxide nanomaterials. The developed ABEI/CuFe2O4 shows great potential in various applications such as biocatalysis, bioassays, biosensing, and bioimaging.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Rongli Mi, Lingzhen Zeng, Maolin Wang, Shuheng Tian, Jie Yan, Shixiang Yu, Meng Wang, Ding Ma
Summary: The utilization of carbon resources stored in plastic polymers through chemical recycling and upcycling is a promising approach. A highly selective reaction route for transforming polylactic acid (PLA) into 1,2-propanediol utilizing a Zn-modified Cu catalyst is presented. This solvent-free reaction exhibits excellent reactivity and selectivity, providing an innovative and economically viable solution for upgrading polyesters.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Bingqing Ge, Yuandong Hu, Hongwei Zhang, Junkang Xu, Peng Zhang, Yuanyuan Yue, Haibo Zhu, Sen Lin, Pei Yuan
Summary: In this study, three PdZr bi-component catalysts supported on modified silica were synthesized and the addition of Zr was found to affect the catalytic activity. The catalyst obtained by introducing Zr before adding Pd showed higher stability and hydrogenation efficiency.
APPLIED SURFACE SCIENCE
(2021)
Article
Biotechnology & Applied Microbiology
Yuan Yao, Quanyuan Chen, Zhaolu Huang, Juan Zhou
Summary: Chalcopyrite, pyrite, sponge iron, and iron-carbon composite were studied as catalysts and electrodes in heterogeneous electro-Fenton oxidation processes, with iron-carbon composite showing the highest catalytic activity for pollutant removal. The addition of sodium chloride had varying effects on the catalytic efficacies of these materials.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Review
Chemistry, Multidisciplinary
Sajid Hussain, Eleonora Aneggi, Daniele Goi
Summary: Innovations in water technology are crucial for addressing challenges such as climate change, resource shortages, and emerging contaminants. The application of metallic catalyst-H2O2 systems in the heterogeneous Fenton process is influenced by various factors, including the unique redox properties of each catalyst and the solution pH.
ENVIRONMENTAL CHEMISTRY LETTERS
(2021)
Article
Energy & Fuels
Jiashi Wang, Ce Du, Qinhong Wei, Wenzhong Shen
Summary: Two-dimensional metallic Pd nanosheets were synthesized via an ion-exchange method and exhibited higher catalytic activity compared to Pd nanoparticles in catalytic reactions.
Article
Engineering, Chemical
Rong Wang, Hongming Sun, Mengxin Liang, Hongwei Zhang, Qingyan Cui, Tinghai Wang, Pei Yuan
Summary: In this study, flower-like and pure-phase supported nickel phosphide catalysts were successfully fabricated through a hydrotalcite strategy with red phosphorus as the phosphorus source. The Ni2P/Al2O3 catalyst exhibited excellent hydrogenation activity, hydrodesulfurization ability, and stability towards the hydrogenation of petroleum resin.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Physical
Xuejie Zhang, Yebin Zhou, Guowei Li, Lei Zhang, Chunyu Yin, Yuanyuan Yang, Hongzheng Wang, Feng Feng, Linwei Wei, Qunfeng Zhang, Feng Yang, Lili Lin, Chunshan Lu, Xiaonian Li
Summary: Developing sulfur resistant and stable hydrogenation catalysts with high activity is important for the production of value-added chemicals, as it allows for the use of crude raw materials, reduces environmental impact, and saves energy.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Giovanni Marco Saladino, Bejan Hamawandi, Mehmet Ali Demir, Idris Yazgan, Muhammet Sadaka Toprak
Summary: The research focused on designing and synthesizing hybrid structures of superparamagnetic iron oxide nanoparticles (SPIONs) coated with sugar ligands (SL) using a green and efficient microwave (MW)-assisted hydrothermal synthesis, with engineered sugar ligands for antibacterial properties against multi-drug resistant bacterial strains.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Multidisciplinary Sciences
Mikael Kordel, Martin Svenda, Hemanth K. N. Reddy, Emelie Fogelqvist, Komang G. Y. Arsana, Bejan Hamawandi, Muhammet S. Toprak, Hans M. Hertz, Jonas A. Sellberg
Summary: The study demonstrates the production of viral particles inside the host cell post infection, with their numbers gradually increasing to a burst size. This research indicates that during viral replication, significant morphological changes occur in the host cell, while the nucleus and nucleolus remain largely unaffected.
SCIENTIFIC REPORTS
(2021)
Article
Thermodynamics
Aminu Yusuf, Nevra Bayhan, Hasan Tiryaki, Bejan Hamawandi, Muhammet S. Toprak, Sedat Ballikaya
Summary: This study examines the output performances of different equations in a hybrid system combining thermoelectric generators with concentrated photovoltaic cells, utilizing nanostructured thermoelectric materials. By optimizing parameters and selecting appropriate models, it was found that the system performs best when the load resistance is less than the internal resistance of the TEG.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Chemistry, Physical
Cagri Y. Oztan, Bejan Hamawandi, Yiqun Zhou, Sedat Ballikaya, Muhammet S. Toprak, Roger M. Leblanc, Victoria Coverstone, Emrah Celik
Summary: This research systematically doped stoichiometric Cu2Se compounds with gel-like Carbon Dots (CDs) and successfully enhanced the thermoelectric performance. The optimum doping ratio was found to be 2 wt%, resulting in a continuous enhancement of ZT to a maximum of 2.1.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Yong Du, Zhenzhen Kong, Muhammet S. Toprak, Guilei Wang, Yuanhao Miao, Buqing Xu, Jiahan Yu, Ben Li, Hongxiao Lin, Jianghao Han, Yan Dong, Wenwu Wang, Henry H. Radamson
Summary: This study successfully grows high-quality Ge epitaxial layers on Si substrates using RPCVD, systematically investigating the morphology and crystal quality of Ge layers under different conditions. The results demonstrate the key factors influencing the quality of Ge layers and highlight the importance of strain and defect formation in the Ge buffer layer.
Article
Chemistry, Multidisciplinary
Bejan Hamawandi, Hazal Batili, Moon Paul, Sedat Ballikaya, Nuzhet I. Kilic, Rafal Szukiewicz, Maciej Kuchowicz, Mats Johnsson, Muhammet S. Toprak
Summary: This study presents rapid and effective methods for synthesizing nanostructured bismuth telluride materials with promising TE performance using microwave volume heating in a short reaction time. The use of water as a solvent is as effective as ethylene glycol, providing a greener reaction medium. Characterization techniques, including XRD, SEM/TEM, XPS and zeta potential, were used to evaluate crystal structure, morphology, crystallinity, microstructure and surface chemistry of the materials. The low thermal conductivity values and high ZT values demonstrate the potential impact of these materials, developed with energy and time efficiency, in advancing TE technology with minimal environmental impact.
Article
Nanoscience & Nanotechnology
Jose F. Serrano-Claumarchirant, Bejan Hamawandi, Adem B. Ergul, Andres Cantarero, Clara M. Gomez, Pankaj Priyadarshi, Neophytos Neophytou, Muhammet S. Toprak
Summary: This study focuses on the development of large-area thermoelectric films using hybrid materials. By blending TE materials with polymers and using a specific solvent, durable polymer, and additive in the ink formulation, the researchers successfully fabricated large-area homogeneous hybrid TE films with improved conductivity and TE power factor.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Y. Slimani, M. A. Almessiere, A. Demir Korkmaz, A. Baykal, A. Manikandan, H. Gungunes, M. S. Toprak
Summary: This study focused on the impact of Ga-Gd co-substitution on the structural, magnetic features and hyperfine interactions of nanosized NiCuZn spinel ferrites. The results showed that the substitution of Ga and Gd influenced the crystallite and particle sizes, as well as the cation distribution, of the spinel ferrites. Magnetometry measurements revealed changes in coercivity and saturation magnetization with the substitution of Ga and Gd. Superparamagnetic-to-ferromagnetic transition was observed below the blocking temperature.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Z. Lalegani, S. A. Seyyed Ebrahimi, B. Hamawandi, L. La Spada, H. Batili, M. S. Toprak
Summary: An epsilon-negative metamaterial (ENM) with core@shell nanoparticles was designed. The optimal performance was achieved by growing a 10 nm SiO2 shell on 54 nm Ag nanoparticles.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Hazal Batili, Bejan Hamawandi, Adem Bjorn Ergul, Muhammet Sadaka Toprak
Summary: This study aimed to assemble thermoelectric films with pre-defined morphology and surface chemistry on non-conductive substrates using electrophoretic deposition (EPD). Bi2Te3 nanoparticles were synthesized and used for the deposition of thermoelectric films on glass substrates. The addition of a molecular linker helped reduce resistance and improve the performance of the films. The measured Seebeck coefficient and power factor indicated the potential application of this technology to large area thermoelectric films.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Materials Science, Multidisciplinary
Huseyin Tombuloglu, Yassine Slimani, Sultan Akhtar, Moneerah Alsaeed, Guzin Tombuloglu, Munirah A. Almessiere, Muhammet S. Toprak, Huseyin Sozeri, Abdulhadi Baykal, Ismail Ercan
Summary: This study investigated the translocation of four different sizes of iron oxide nanoparticles in pumpkins. Only the 30-50 nm nanoparticles were significantly translocated to the leaves, showing size-dependent translocation.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Giovanni Marco Saladino, Carmen Vogt, Bertha Brodin, Kian Shaker, Nuzhet Inci Kilic, Kenth Andersson, Marie Arsenian-Henriksson, Muhammet Sadaka Toprak, Hans Martin Hertz
Summary: In this study, hybrid ruthenium-decorated superparamagnetic iron oxide nanoparticles were designed as contrast agents for both magnetic resonance imaging (MRI) and X-ray fluorescence computed tomography (XFCT). These nanoparticles were synthesized through a one-pot polyol hot injection method. In vivo preclinical studies showed the possibility of correlative bioimaging using these contrast agents. The complementary nature of MRI and XFCT allowed for accurate localization and high specificity and resolution in nanoparticle detection, suggesting potential applications for early tumor diagnosis, improved long-term treatment monitoring, and enhanced radiotherapy planning.
Article
Biotechnology & Applied Microbiology
Govind Gupta, Bejan Hamawandi, Daniel J. Sheward, Ben Murrell, Leo Hanke, Gerald McInerney, Magda Blosi, Anna L. Costa, Muhammet S. Toprak, Bengt Fadeel
Summary: Silver nanoparticles (Ag NPs) have been found to effectively inhibit SARS-CoV-2 infection, particularly the unmodified nanoparticles. This study also showed that the Ag NPs retained their antiviral properties even after pre-incubation with pulmonary surfactant. Additionally, the Ag NPs disrupted the secondary structure of the spike protein of SARS-CoV-2, while ionic control (AgNO3) and TiO2 nanoparticles did not have the same effect. Moreover, the Ag NPs were non-cytotoxic to human lung epithelial cells and nasal epithelial cells.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Giovanni Marco Saladino, Ronak Kakadiya, Shaquib Rahman Ansari, Alexandra Teleki, Muhammet Sadaka Toprak
Summary: Superparamagnetic iron oxide nanoparticles (SPIONs) play a dominant role in various biomedical applications, including magnetic separation, drug delivery, diagnostics, and hyperthermia treatments. In this study, superparamagnetic nanoclusters (SP-NCs) with high unit magnetization and diameters up to 400 nm were synthesized using conventional or microwave-assisted solvothermal methods. The choice of synthesis route and capping agent significantly influenced the particle size, SP-NC size, surface chemistry, and magnetic properties. The SP-NCs were then coated with a silica shell doped with a fluorophore to provide fluorescence properties and high stability. The heating efficiency studies demonstrated the potential of these synthesized SP-NCs in hyperthermia treatment. The enhanced magnetically-active content, fluorescence, magnetic property, and heating efficiency of SP-NCs offer promising opportunities for biomedical applications.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Anna Luisa Costa, Magda Blosi, Andrea Brigliadori, Ilaria Zanoni, Simona Ortelli, Felice Carlo Simeone, Serena Delbue, Sarah D'Alessandro, Silvia Parapini, Claudia Vineis, Alessio Varesano, Muhammet S. Toprak, Bejan Hamawandi, Davide Gardini
Summary: This study explores the antiviral and antibacterial properties of quaternized hydroxyethyl cellulose-stabilized silver nanoparticles (Ag-HEC) in different environments. The results show the potential application of Ag-HEC in protective clothing and nasal masks, providing a broad-spectrum antimicrobial solution.
ENVIRONMENTAL SCIENCE-NANO
(2022)
